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c program

draw the final queue after following operations have been performed on an empty queue.
push(4),pop(),push(7),push(8),pop(),push(7),push(9 ),pop(),push(8),push(5)
Jan 23 '07 #1
1 1058
DeMan
1,806 1GB
It would help if you showed some of your progress, so rather than give you the answer, I'll trry to explain how a queue works...

A queue (much like a physical queue) is a First In, First Out structure. You can picture it as a tube running left to right. When something is pushed tyo a queue, it enters from the left hand side, and moves as far right as it can (without overtaking another element). When you pop something from the queue, you take the next element from the right hand side.

What this question is asking is what is the order (right to left) of the elements left in the queue after these operations.

Simple Example:
Expand|Select|Wrap|Line Numbers
  1. push(a) 
  2.  Queue = {a}
  3.  
  4. push b
  5.  Queue = {b, a}
  6.  
  7. push c
  8.  Queue = {c, b, a}
  9.  
  10. pop
  11.   Queue = {c, b}       -      [and a is returned]
  12.  
I leave it to design the queue with your values.....
Jan 23 '07 #2

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